-Removed the pipenet network datum, now it will all be done with the pipeline datum
-All atmos pipes and machines will always have a pipeline datum
-Moved the valves to the binary subtype and the portable connectors to the unary subtype
-The pipe vents (who were barely used in three spots of the map) are removed, the map slots will replaced with outlets
-Fixes some bugs of pipenet disconnection, mostly on explosions
-Cleaned a bit the copypaste of construction.dm of pipes
-Removed the ID restrictions of digital valves and the frequency (both unused)
Station Roles are picked before Syndie Roles unless it is nuke or wizard
People should no longer spawn in space because they did not get a job.
Heads and such should no longer get a role they should not have.
Rounds now have a minimum number of players required for it to start up.
Also the atmos pipes should stop exploding all over the place.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1974 316c924e-a436-60f5-8080-3fe189b3f50e
